I've switched to Vivaldi. I've loved Firefox, was loyal to it for most of its life, since its very beginning. But the developers changed, became people that 'know what's best for you', and have arbitrarily changed it so much, that I feel they moved away from me.
I don't like Chrome (or changes in Firefox that are Chrome-like), but Vivaldi was much more appealing, flexible, supported most of what I wanted, with very good performance. Plus, it is Chromium based, which means it supports Chrome extensions like WikiTree-X, something I use a lot, on almost every profile I work on.